Microsoft on Thursday unveiled a long-awaited version of its Office suite for iPad, bringing productivity applications Word, Excel and PowerPoint to Apple’s tablet lineup, requiring users to subscribe to its Office 365 service for editing documents.

Microsoft was quick to emphasize at a media event in San Francisco on Thursday that the new Office for iPad was built from the ground up for Apple’s platform. They showcased how documents can be synced to Microsoft’s OneDrive cloud service.

Office for iPad will use what Microsoft referred to as a “freemium model,” allowing users to install the app view documents, but requiring a subscription to Office 365 to make edits.